St. Irenaeus, Against Heresies, Book 3, Chap. 3, A.D. 180:  “Since, however, it would be very tedious in such a volume as this, to reckon up the successions of all the Churches, we do put to confusion all those who… assemble in unauthorized meetings; [we do this, I say] by indicating that tradition derived from the apostles, of the very great, the very ancient, and universally known Church founded and organized at Rome by the two most glorious apostles, Peter and Paul; as also [by pointing] out the faith preached to men, which comes down to our time by means of the successions of the bishops.  For it is a matter of necessity that every Church should agree with this Church [i.e. of Rome], on account of its preeminent authority, that is, the faithful everywhere...”